US4331725A - Wrapping materials - Google Patents

Wrapping materials Download PDF

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Publication number
US4331725A
US4331725A US06/274,569 US27456981A US4331725A US 4331725 A US4331725 A US 4331725A US 27456981 A US27456981 A US 27456981A US 4331725 A US4331725 A US 4331725A
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United States
Prior art keywords
adhesive layer
holes
wrapping material
net
form
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Expired - Fee Related
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US06/274,569
Inventor
Mutsuo Akao
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Fujifilm Corp
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Fujifilm Corp
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Priority to JP55-81572 priority Critical
Priority to JP8157280A priority patent/JPS576754A/en
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Assigned to FUJI PHOTO FILM CO., LTD. reassignment FUJI PHOTO FILM CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AKAO, MUTSUO
Application granted granted Critical
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Anticipated expiration legal-status Critical
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04Interconnection of layers
    • B32B7/12Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/18Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/32Layered products comprising a layer of synthetic resin comprising polyolefins
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1207Heat-activated adhesive
    • B32B2037/1215Hot-melt adhesive
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00Layers arrangement
    • B32B2250/033 layers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00Layers arrangement
    • B32B2250/40Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/50Properties of the layers or laminate having particular mechanical properties
    • B32B2307/514Oriented
    • B32B2307/516Oriented mono-axially
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00Polyalkenes
    • B32B2323/04Polyethylene
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00Polyalkenes
    • B32B2323/04Polyethylene
    • B32B2323/043HDPE, i.e. high density polyethylene
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2553/00Packaging equipment or accessories not otherwise provided for
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00Stock material or miscellaneous articles
    • Y10S428/91Product with molecular orientation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24273Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
    • Y10T428/24322Composite web or sheet
    • Y10T428/24331Composite web or sheet including nonapertured component
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/249921Web or sheet containing structurally defined element or component
    • Y10T428/249953Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249962Void-containing component has a continuous matrix of fibers only [e.g., porous paper, etc.]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/249921Web or sheet containing structurally defined element or component
    • Y10T428/249953Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249981Plural void-containing components
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/249921Web or sheet containing structurally defined element or component
    • Y10T428/249953Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249982With component specified as adhesive or bonding agent
    • Y10T428/249984Adhesive or bonding component contains voids
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/249921Web or sheet containing structurally defined element or component
    • Y10T428/249953Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249987With nonvoid component of specified composition
    • Y10T428/249991Synthetic resin or natural rubbers
    • Y10T428/249992Linear or thermoplastic
    • Y10T428/249993Hydrocarbon polymer

Abstract

A wrapping material, which has excellent physical strength and which is suitable for use in making a bag, comprising two uniaxially-stretched thermoplastic resin films which are disposed in such a manner that the stretching directions of the two films intersect each other at an angle of 45° to 90° and an adhesive layer sandwiched between the two films wherein the adhesive layer has a plurality of holes perforating the adhesive layer in the form of a net.

Description

FIELD OF THE INVENTION

The present invention relates to wrapping materials having excellent physical strength.

BACKGROUND OF THE INVENTION

In general, wrapping materials must have various characteristics depending on the type, shape, weight, etc. of the article to be wrapped therewith. Particularly, wrapping materials for use in making bags must have superior physical characteristics, that is, have excellent tear strength, tensile strength, burst strength, impact strength and so on.

Wrapping materials having such excellent physical strength have been proposed, for example, in Japanese Utility Model Application Laid-open Nos. 133631/77 (corresponding to U.S. Pat. No. 4,147,291) and 21168/80 (corresponding to U.S. Pat. No. 4,258,848 and G.B. Pat. No. 2,026,942A). These known wrapping materials are so-called cross-lamainated film wrapping materials having the layer structure schematically illustrated in FIG. 1. More specifically, two uniaxially-stretched high density polyethylene films 1 and 2 are disposed so that their stretching axes form an angle of 45° to 90° with each other, and they are bonded together through an adhesive layer 3. As the adhesive layer 3, a thermoplastic resin, such as low density polyethylene, is usually employed. In some cases, however, films 1 and 2 may be heat-sealed at a suitable heating temperature of about 180° C., for example, without the application of the adhesive layer 3.

These cross-laminated film wrapping materials have satisfactory strength in any of longitudinal, lateral and oblique directions because the stretching axes intersect each other. Thus, compared with conventional wrapping materials, for example, composite laminate films comprising a low density polyethylene film and paper, an aluminum foil or the like, they have greatly improved physical strength.

It has been found, however, that the physical strength of the cross-laminated film wrapping material varies depending on the thickness of the adhesive layer 3 and that the physical strength decreases with increasing thickness. The reason for this is believed to be in bonding films 1 and 2 together with adhesive layer having a thickness which is beyond the critical value, they are completely united into a body and act as substantially one film although they are disposed in such a manner that their stretching axes intersect each other.

Therefore, it is necessary to minimize the thickness of the adhesive layer 3. However, if the thickness of the adhesive layer 3 is reduced excessively, breakage of the adhesive layer 3 will occur. This leads to a peelingoff of the films 1 and 2 at the part where breakage of the adhesive layer 3 occurs.

On the other hand, in the method where films 1 and 2 are heat-sealed, heat-shrinkage of the stretched film occurs at the areas heated. This results in the formation of wrinkles which are not desirable from the standpoint of quality.

SUMMARY OF THE INVENTION

An object of the invention is to provide a novel wrapping material which is free from the above-described drawbacks of conventional wrapping materials.

This invention, therefore, provides a wrapping material comprising two uniaxially-stretched thermoplastic resin films which are disposed in such a manner that their stretching axes from an angle of 45° to 90° and an adhesive layer interposed therebetween wherein the adhesive layer has a plurality of holes perforating the adhesive layer in the form of a net.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view showing the layer structure of a conventional wrapping material.

FIG. 2 is a cross-sectional view of a preferred embodiment of the wrapping material of this invention.

FIG. 3 is a perspective view of an adhesive layer.

FIGS. 4 to 6 are cross-sectional views of other embodiments of the wrapping material of this invention.

DETAILED DESCRIPTION OF THE INVENTION

The invention is explained in greater detail below by reference to the accompanying drawings.

Referring to FIG. 2 which shows a cross-sectional view of a preferred embodiment of the invention, the wrapping material comprises uniaxially-stretched thermoplastic resin films 4 and 5, and an adhesive layer 6 having a plurality of holes 6a perforated therethrough such that the adhesive 6 has the form of a net.

The uniaxially-stretched thermoplastic resin films 4 and 5 can be made of any thermoplastic resin which can be uniaxially stretched. Considering availability, generalpurpose properties, production suitability and cost, polyethylene having various densities, polypropylene, polystyrene, polyvinylidene chloride, polyvinyl chloride, polycarbonate, polyethylene terephthalate, polyamide and the like, are preferably used. Of these films, a uniaxially-stretched high density polyethylene film having a density of 0.94 g/cm3 or more is particularly preferred. These films may be stretched in any of the longitudinal, lateral and oblique directions to provide uniaxially-stretched thermoplastic resin films 4 and 5. In any case, these films must be disposed in such a manner that the stretching directions intersect with each other and form an angle of 45° to 90°.

The uniaxially-stretched thermoplstic resin films 4 and 5 may be oriented polymer films.

For the preparation of the adhesive layer 6, known hot melt adhesives made of an ethylene-vinyl acetate copolymer, low molcular weight polyethylene and polyamide as well as thermoplastic resins, such as low density polyethylene, polypropylene, an ethylene-vinyl acetate copolymer, and an ionomer resin can be employed. In the preparation of the wrapping material of the invention, a suitable foaming agent, such as an inorganic foaming agent (e.g., sodium hydrogen carbonate), an organic foaming agent (e.g., diazoaminobenzene), or water, is added to the hot melt adhesive or the thermoplstic resin, and the mixture thus formed is extruded between the films 4 and 5 using a suitable coating apparatus. During the extrusion, an adhesive layer 6 as illustrated in FIG. 3, which has a plurality of holes perforated therethrough is formed in the form of a net, and which is interposed or sandwiched between films 4 and 5. For example, when a low density polyethylene resin is used, water is added as a foaming agent to the resin in an amount of 0.1 to 10% by weight prior to the melting thereof, and the mixture thus formed is extrusion-coated using the known T-die coating process.

Although the space occupied by the holes 6a in the adhesive layer 6 (hereinafter, referred to as "space ratio") will vary depending on the amount of water or foaming agent added, the space ratio is determined taking into account the physical strength which is required for the wrapping material. Usually, the space ratio is controlled within the range of about 5 to 90%, preferably 20 to 70%, more preferably 30 to 60%.

In the wrapping material of the invention, the two uniaxially-stretched thermoplastic resin films 4 and 5 are bonded together through the adhesive layer 6 having a plurality of holes perforated therethrough in the form of a net, in such a manner that the stretching directions of the films 4 and 5 intersect each other at an angle of 45° to 90°. The presence of the holes 6a in the adhesive layer 6 prevents the uniaxially-stretched thermoplastic resin films 4 and 5 from coming into contact with each other at least at the areas of the holes 6a. At these areas, therefore, a cross orientation effect (i.e., greatly increased tear strength obtained by intersection of the differing orientation directions of the films 4 and 5) of each film is produced and sufficient physical strength can be obtained.

Furthermore, the provision of the spaces or holes 6a reduces the amount of the adhesive to be used, that is the amount of the adhesive at least corresponding to the volume of the holes 6a can be reduced. This produces the advantage that as compared with conventional wrapping materials without holes, the production cost can be reduced.

Furthermore, the adhesive layer 6 is provided in a thickness sufficient to bond together uniaxially-stretched thermoplastic films 4 and 5 although the thickness will vary depending on the space ratio. Briefly, so long as the minimum thickness (usually, about 7 microns) to bond together the films 4 and 5 is maintained, any greater thickness can be selected. Thus, the preparation of the adhesive layer 6 can be simplified.

The following non-limiting example is given to illustrate the invention in greater detail.

EXAMPLE

A conventional wrapping material having the layer structure shown in FIG. 1 and a wrapping material of this invention having the layer structure shown in FIG. 2 were prepared and were compared as to physical strength and production cost.

The conventional wrapping material was prepared as follows:

Two 45μ thick uniaxially-stretched high density polyethylene films were disposed in such a manner that the stretching axes of the films intersected each other at an angle of 90°. Then, an adhesive layer composed of low density polyethylene was provided therebetween in a thickness of 20μ by extrusion coating, so that the films were bonded together to provide a wrapping material having a total thickness of 10μ.

The wrapping material of this invention was prepared as follows:

The same two 45μ thick uniaxially-stretched high density polyethylene films as used in the preparation of the conventional wrapping material were disposed in the same manner as in the preparation of the conventional wrapping material prepared as above, in such a manner that the stretching axes of the films intersected each other at an angle of 90°. Then, water was added as a foaming agent to a low density polyethylene in an amount of 1% by weight based on the low density polyethylene and, the resulting mixture was provided between the two uniaxially stretched films by extrusion coating followed by pressing with heatrollers, so that the films were bonded together through an adhesive layer having a plurality of holes in the form of a net (space ratio: 20%) to provide the wrapping material of this invention having a total thickness of 110μ.

The physical strength of the two wrapping materials thus formed was tested according to the test methods described below. The results obtained are shown in Table 1.

Tear Strength:

Measured by JIS P-8116-1976.

Abrasion Resistance:

Each wrapping material was used to make a bag. An article having a weight of about 5 kg was placed in the bag, and then the bag was sealed. After a vibration test according to JIS level II, the extent of damage of the surface of the wrapping material was evaluated.

Impact Perforation Strength:

Measured by JIS 8134.

              TABLE 1______________________________________      Conventional                  Wrapping Material      Wrapping Material                  of This Invention______________________________________Tear Strength Longitudinal        ○               600    g     ⊚                                 960  g Direction Lateral     ○               1,050  g     ⊚                                 1,500                                      g DirectionImpact Perforation        ○               4.8    kg . cm                            ⊚                                 8.5  kg . cmStrengthAbrasion Resistance        ○            ⊚Production Cost*    100               90______________________________________ ○: Excellent for practical use. ⊚: Particularly excellent for practical use.  *The production cost of the conventional wrapping material was set at 10 and the production cost of the wrapping material of this invention was compared relative thereto.

As can be seen from the results in Table 1, the wrapping material of this invention is superior in both physical strength and production cost to the conventional wrapping material.

The invention is not limited to the embodiment as described hereinbefore. For example, the following modifications can be made thereto.

FIG. 4 shows an embodiment wherein an adhesive layer 3 without holes is interposed in the wrapping material shown in FIG. 2, that is, the adhesive layer 3 without holes is sandwiched between one of the two uniaxiallystretched thermoplastic resin films and the adhesive layer having a plurality of holes in the form of a net.

FIGS. 5 and 6 show wrapping materials wherein a flexible sheet 7 made of a synthetic resin film, paper, an aluminum foil or cloth is interposed between two adhesive layers. At least one adhesive layer of the two adhesive layers must be an adhesive layer having a plurality of holes in the form of a net of this invention. However, the other adhesive layer of the two adhesive layer may be an adhesive layer having a plurality of holes in the form of a net (FIG. 5) or an adhesive layer without holes (FIG. 6).

All the wrapping materials as shown in FIGS. 4, 5 and 6 are included within the scope of this invention, and appropriate structure can be selected depending on the application for which the wrapping material is used. Although these wrapping materials have a complicated layer structure compared with the wrapping material shown in FIG. 2, they are further improved from the standpoint of physical strength.

As described in detail, the wrapping material of the invention has sufficiently satisfactory physical strength, and therefore when it is used in making a bag, the markedly significant practical advantages are obtained.

Further, the uniaxially-stretched thermoplastic resin film, the adhesive layer having a plurality of holes in the form of a net, the adhesive layer without holes and the flexible sheet may contain therein (i) an antistatic agent, (ii) a light-shielding agent such as carbon black, coloring pigments, aluminum powder, aluminum paste and coloring dyes, (iii) a slip agent and/or (iv) an antioxidant.

While the invention has been described in detail and with reference to specific embodiment thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.

Claims (12)

What is claimed is:
1. A wrapping material comprising at least (1) two uniaxially-stretched thermoplastic resin films which are disposed in such a manner that the stretching directions of the two films intersect each other at an angle of 45° to 90° and (2) an adhesive layer sandwiched between the two films wherein the adhesive layer has a plurality of holes perforating the adhesive layer in the form of a net.
2. A wrapping material as in claim 1 additionally comprising an adhesive layer without holes sandwiched between one of the two films and the adhesive layer having a plurality of holes in the form of a net.
3. A wrapping material as in claim 2 additionally comprising a flexible sheet sandwiched between the adhesive layer having a plurality of holes in the form of a net and the adhesive layer without holes.
4. A wrapping material as in claim 1 comprising the following laminate:
(a) an uniaxially stretched thermoplastic resin film;
(b) an adhesive layer having a plurality of holes in the form of a net;
(c) a flexible sheet;
(d) an adhesive layer having a plurality of holes in the form of a net; and
(e) an uniaxially-stretched thermoplastic resin film disposed in such a manner that the stretching directions of the two films (a) and (e) intersect each other at an angle of 45° to 90°.
5. A wrapping material as in claim 1, wherein the uniaxially-stretched thermoplastic resin film is a polyolefin resin film.
6. A wrapping material as in claim 5, wherein the polyolefin resin film is a high density polyethylene film having a density of 0.94 g/cm3 or more.
7. A wrapping material as in claim 1, wherein the adhesive layer having a plurality of holes in the form of a net has a space ratio of about 5 to 90%.
8. A wrapping material as in claim 1, wherein the adhesive layer having a plurality of holes in the form of a net is formed by extrusion coating after adding a foaming agent to a thermoplastic resin or a hot melt adhesive.
9. A wrapping material as in claim 8, wherein water is added as a foaming agent in an amount of 0.1 to 10% by weight.
10. A wrapping material as in claim 3 or 4, wherein one of the uniaxially-stretched film, the adhesive layer having a plurality of holes in the form of a net, the adhesive layer without holes, and the flexible sheet contains therein at least one of (i) an antistatic agent, (ii) an light-shielding agent, (iii) a slip agent, and (iv) an antioxidant.
11. A wrapping material as in claim 1, 5, 6, 7, 8 or 9, wherein one of the uniaxially-stretched film and the adhesive layer having a plurality of holes in the form of a net contains therein at least one of (i) an antistatic agent, (ii) a light-shielding agent, (iii) a slip agent, and (iv) an antioxidant.
12. A wrapping material as in claim 2, wherein one of the uniaxially-stretched film, the adhesive layer having a plurality of holes in the form of a net and the adhesive layer without holes contains therein at least one of (i) an antistatic agent, (ii) a light-shielding agent, (iii) a slip agent, and (iv) an antioxidant.
US06/274,569 1980-06-17 1981-06-17 Wrapping materials Expired - Fee Related US4331725A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP55-81572 1980-06-17
JP8157280A JPS576754A (en) 1980-06-17 1980-06-17 Packing material

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US4331725A true US4331725A (en) 1982-05-25

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DE (1) DE3123680A1 (en)
GB (1) GB2080732B (en)

Cited By (50)

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US4469741A (en) * 1980-11-04 1984-09-04 Fuji Photo Film Co., Ltd. Laminated sheets
US4550046A (en) * 1983-06-20 1985-10-29 Miller Stephen D Insulating material
US4587175A (en) * 1983-12-28 1986-05-06 Fuji Photo Film Co., Ltd. Laminate sheets
US4653640A (en) * 1984-09-07 1987-03-31 Fuji Photo Film Co., Ltd. Packaging materials for photosensitive materials and process for producing same
US4687692A (en) * 1985-04-15 1987-08-18 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US4720416A (en) * 1987-03-09 1988-01-19 Mobil Oil Corporation Pressure sensitive label stock material possessing a wrinkle-resistant lustrous, opaque laminate film facing
US4769264A (en) * 1987-07-15 1988-09-06 Minnesota Mining And Manufacturing Company On page fragrance sampling device
US4778713A (en) * 1986-04-15 1988-10-18 Fuji Photo Film Co., Ltd. Wrapping paper for thermosensitive recording materials
US4778712A (en) * 1984-03-09 1988-10-18 Fuji Photo Film Co., Ltd. Packaging films for photosensitive materials
US4784906A (en) * 1985-09-11 1988-11-15 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials for photographic purpose
US4787506A (en) * 1986-04-12 1988-11-29 Fuji Photo Film Co., Ltd. Magazine for photosensitive materials
US4826723A (en) * 1986-10-22 1989-05-02 Schreiner Luchtvaart Groep B.V. Sandwich construction and a method of making a sandwich construction
US4828106A (en) * 1986-06-27 1989-05-09 Fuji Photo Film Co., Ltd. Packaging case for photosensitive sheet films
US4871613A (en) * 1986-04-07 1989-10-03 Fuji Photo Film Co., Ltd. Packaging material
US4876125A (en) * 1987-07-22 1989-10-24 Fuji Photo Film Co., Ltd. Gusset bag for photographic photosensitive materials
US4876129A (en) * 1986-06-23 1989-10-24 Fuji Photo Film Co., Ltd. Packaging material for photographic photosensitive materials
US4894264A (en) * 1987-04-28 1990-01-16 Fuji Photo Film Co., Ltd. Gusset bag for photographic photosensitive materials
US4906517A (en) * 1987-01-23 1990-03-06 Fuji Photo Film Co. Packaging material for photosensitive materials
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US5017429A (en) * 1987-05-15 1991-05-21 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US5023120A (en) * 1988-12-05 1991-06-11 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US5026594A (en) * 1988-02-18 1991-06-25 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US5026600A (en) * 1987-08-24 1991-06-25 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US5043127A (en) * 1986-10-22 1991-08-27 Schreiner Luchtvaart Groep B.V. Method of making a shaped article from a sandwich construction
US5055344A (en) * 1988-11-29 1991-10-08 Konica Corporation Material for packaging light-sensitive materials
US5100721A (en) * 1988-11-17 1992-03-31 Fuji Photo Film Co., Ltd. Flat laminated thermoplastic multilayer film and manufacturing method of the same
US5110643A (en) * 1987-01-23 1992-05-05 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US5110639A (en) * 1989-07-13 1992-05-05 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US5118563A (en) * 1987-09-18 1992-06-02 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US5160784A (en) * 1991-06-28 1992-11-03 The Dow Chemical Company Fire-resistant thermoplastic composite structure
US5225466A (en) * 1987-03-04 1993-07-06 Fuji Photo Film Co., Ltd. Resin composition for articles molded by injection molding for photographic photosensitive materials
US5240754A (en) * 1986-03-12 1993-08-31 Fuji Photo Film Co., Ltd. Container for photographic film cartridge
US5275283A (en) * 1986-08-19 1994-01-04 Fuji Photo Film Co., Ltd. Container for light-sensitive strip materials having improved light sealing means
US5489472A (en) * 1990-11-07 1996-02-06 Tetra Laval Holdings & Finance S.A. Packaging material with good gas barrier properties and also packaging container manufactured from the material
US5618630A (en) * 1994-06-27 1997-04-08 Mobil Oil Corporation Cross-laminated multilayer film structure for use in the production of banknotes or the like
US5698333A (en) * 1994-06-27 1997-12-16 Mobil Oil Corporation Multilayer film structures for use in the production of banknotes or the like
US5716695A (en) * 1996-02-15 1998-02-10 Mobil Oil Corp Cross-laminated multilayer film structures for use in the production of banknotes or the like
US5879028A (en) * 1998-04-23 1999-03-09 Mobil Oil Corporation Weakened oriented high density polyethylene film for multilayer security document lamination
US5935696A (en) * 1997-06-11 1999-08-10 Mobil Oil Corporation Multilayer film structures for use in the production of banknotes or the like
US6294267B1 (en) 1994-06-27 2001-09-25 Exxonmobil Oil Corporation Core printed security documents
US20020088533A1 (en) * 1999-03-05 2002-07-11 Reef Industries, Inc. Reinforced shrink wrap and method of manufacture
US20030129431A1 (en) * 1998-10-23 2003-07-10 Michael R. Nowak Composite wrap material
US20030190474A1 (en) * 2002-04-05 2003-10-09 Nowak Michael R. High strength film ream wrap
EP1591373A1 (en) * 2002-12-13 2005-11-02 Hosokawa Yoko Co., Ltd. Packaging material
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US4469741A (en) * 1980-11-04 1984-09-04 Fuji Photo Film Co., Ltd. Laminated sheets
US4550046A (en) * 1983-06-20 1985-10-29 Miller Stephen D Insulating material
US4950512A (en) * 1983-07-09 1990-08-21 Fuji Photo Film Co., Ltd. Laminated material and formed article for packaging photographic materials
US4587175A (en) * 1983-12-28 1986-05-06 Fuji Photo Film Co., Ltd. Laminate sheets
US4778712A (en) * 1984-03-09 1988-10-18 Fuji Photo Film Co., Ltd. Packaging films for photosensitive materials
US4653640A (en) * 1984-09-07 1987-03-31 Fuji Photo Film Co., Ltd. Packaging materials for photosensitive materials and process for producing same
US4687692A (en) * 1985-04-15 1987-08-18 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US4784906A (en) * 1985-09-11 1988-11-15 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials for photographic purpose
US5240754A (en) * 1986-03-12 1993-08-31 Fuji Photo Film Co., Ltd. Container for photographic film cartridge
US4871613A (en) * 1986-04-07 1989-10-03 Fuji Photo Film Co., Ltd. Packaging material
US4787506A (en) * 1986-04-12 1988-11-29 Fuji Photo Film Co., Ltd. Magazine for photosensitive materials
US4778713A (en) * 1986-04-15 1988-10-18 Fuji Photo Film Co., Ltd. Wrapping paper for thermosensitive recording materials
US4876129A (en) * 1986-06-23 1989-10-24 Fuji Photo Film Co., Ltd. Packaging material for photographic photosensitive materials
US4828106A (en) * 1986-06-27 1989-05-09 Fuji Photo Film Co., Ltd. Packaging case for photosensitive sheet films
US5275283A (en) * 1986-08-19 1994-01-04 Fuji Photo Film Co., Ltd. Container for light-sensitive strip materials having improved light sealing means
US5043127A (en) * 1986-10-22 1991-08-27 Schreiner Luchtvaart Groep B.V. Method of making a shaped article from a sandwich construction
US4826723A (en) * 1986-10-22 1989-05-02 Schreiner Luchtvaart Groep B.V. Sandwich construction and a method of making a sandwich construction
US5110643A (en) * 1987-01-23 1992-05-05 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US4906517A (en) * 1987-01-23 1990-03-06 Fuji Photo Film Co. Packaging material for photosensitive materials
US5225466A (en) * 1987-03-04 1993-07-06 Fuji Photo Film Co., Ltd. Resin composition for articles molded by injection molding for photographic photosensitive materials
US4720416A (en) * 1987-03-09 1988-01-19 Mobil Oil Corporation Pressure sensitive label stock material possessing a wrinkle-resistant lustrous, opaque laminate film facing
US4894264A (en) * 1987-04-28 1990-01-16 Fuji Photo Film Co., Ltd. Gusset bag for photographic photosensitive materials
US5017429A (en) * 1987-05-15 1991-05-21 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US4769264A (en) * 1987-07-15 1988-09-06 Minnesota Mining And Manufacturing Company On page fragrance sampling device
US4981734A (en) * 1987-07-17 1991-01-01 Fuji Photo Film Co., Ltd. Packaging materials
US4876125A (en) * 1987-07-22 1989-10-24 Fuji Photo Film Co., Ltd. Gusset bag for photographic photosensitive materials
US5026600A (en) * 1987-08-24 1991-06-25 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US5118563A (en) * 1987-09-18 1992-06-02 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US4978572A (en) * 1987-10-05 1990-12-18 Fuji Photo Film Co., Ltd. Laminated film
US5414032A (en) * 1987-11-06 1995-05-09 Fuji Photo Film Co., Ltd. Resin composition for a core for web material
US4989802A (en) * 1987-11-06 1991-02-05 Fuji Photo Film Co., Ltd. Core for web material
US4925711A (en) * 1987-12-15 1990-05-15 Fuji Photo Film Co., Ltd. Packaging bag for photosensitive materials and bag-making method thereof
US5026594A (en) * 1988-02-18 1991-06-25 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US5100721A (en) * 1988-11-17 1992-03-31 Fuji Photo Film Co., Ltd. Flat laminated thermoplastic multilayer film and manufacturing method of the same
US5055344A (en) * 1988-11-29 1991-10-08 Konica Corporation Material for packaging light-sensitive materials
US5023120A (en) * 1988-12-05 1991-06-11 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US4977033A (en) * 1988-12-29 1990-12-11 Fuji Photo Film Co., Ltd. Packaging material
US5110639A (en) * 1989-07-13 1992-05-05 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US5489472A (en) * 1990-11-07 1996-02-06 Tetra Laval Holdings & Finance S.A. Packaging material with good gas barrier properties and also packaging container manufactured from the material
US5160784A (en) * 1991-06-28 1992-11-03 The Dow Chemical Company Fire-resistant thermoplastic composite structure
US5618630A (en) * 1994-06-27 1997-04-08 Mobil Oil Corporation Cross-laminated multilayer film structure for use in the production of banknotes or the like
US6294267B1 (en) 1994-06-27 2001-09-25 Exxonmobil Oil Corporation Core printed security documents
US5698333A (en) * 1994-06-27 1997-12-16 Mobil Oil Corporation Multilayer film structures for use in the production of banknotes or the like
US5716695A (en) * 1996-02-15 1998-02-10 Mobil Oil Corp Cross-laminated multilayer film structures for use in the production of banknotes or the like
US5935696A (en) * 1997-06-11 1999-08-10 Mobil Oil Corporation Multilayer film structures for use in the production of banknotes or the like
US5879028A (en) * 1998-04-23 1999-03-09 Mobil Oil Corporation Weakened oriented high density polyethylene film for multilayer security document lamination
US20030129431A1 (en) * 1998-10-23 2003-07-10 Michael R. Nowak Composite wrap material
US20020088533A1 (en) * 1999-03-05 2002-07-11 Reef Industries, Inc. Reinforced shrink wrap and method of manufacture
US20030190474A1 (en) * 2002-04-05 2003-10-09 Nowak Michael R. High strength film ream wrap
EP1591373A4 (en) * 2002-12-13 2007-09-19 Hosokawa Yoko Kk Packaging material
EP1591373A1 (en) * 2002-12-13 2005-11-02 Hosokawa Yoko Co., Ltd. Packaging material
US20060051572A1 (en) * 2002-12-13 2006-03-09 Satoshi Suzuki Packaging material
US8646604B2 (en) 2008-01-30 2014-02-11 Lts Lohmann Therapie-Systeme Ag Micro- and/or nano-structured packaging material
DE102008006788A1 (en) * 2008-01-30 2009-08-13 Lts Lohmann Therapie-Systeme Ag Micro- and / or nano-structured packing material
US20100320111A1 (en) * 2008-01-30 2010-12-23 Lts Lohmann Therapie-Systeme Ag Micro-and/or nano-structured packaging material

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GB2080732A (en) 1982-02-10
JPS576754A (en) 1982-01-13
DE3123680A1 (en) 1982-05-06
GB2080732B (en) 1984-05-02

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